Dyestuffs of the triarylmethane series



Patented May 14, 1940 UNITED STATES DYESTUFFS OF PATENT OFFICE:

THE TRIARYLMETHANE' SERIES I [Ernst Teupel, Schkopau, and Ottmar Wahl; 'Leverkusen-I. G.-Werk, Germany, assignors to General Aniline & Film'Uorporation, a corporation of Delaware No I lrawing. Application January 25, 1938, Se-

rial No. 186,817. In Germany November 22,

1: Claim.

position to the carbinol C- -atom, R stands for an ar'yl'ene radical, X stands for a radical otthe alkyl, aralkyl or aryl series, Y stands for a hydrogen atom or for a radical of the alkyl, aralkyl pr aryl series, and the groups-NH and I l Y s .o y

X stand in orthoor para position to each other. Our new dyestuffs are obtainable by starting with such dyestuflfs of the triarylmethane series as contain a replaceableatom or group in paraposition to the carbinol. C-atom, for instance a halogen atom, an alkoxy group, the sulfonic acid group orthe nitrogroup; and reacting upon the same' with an orthoor para-arylenediamine of the general iormula:

NHzRN wherein. R, X, and Y,mean the same asstated vabovea Our new dyestufis are in form of their alkali metal salts generally dark, lustrous powders, dyeing the animal fiber generally greenish blue to reddish violet shades of good fastness to light I and of good dischargeability.

This application is a continuation in part of our copendingflapplication.Serial Number 50,472, filed November 18,1935.

The invention is illustrated by the following examples, Without being limited thereto, the parts being by weight:

Emamplell 300 parts or the dyestuff of the following formula:

SOaIElI the same starting dyestufi with Nj-benzyl-orthophenylenediamine.

Ewample 2 10 parts of the dyestufi of the following constitution:

I Has CH3 are heated for 36 hours to about 95 C. with 4.4 parts of para-aminomethylbenzylaniline-ortho*- sulfonic acid of the formula:

' in 50' cos. of pyridine and cos. of water. The

pyridine is distilled ofi in vacuo; the residue is dissolved in 500 cost of water and the dyestufi precipitated with sodium chloride and then fil-I tered by suction. It is purified'by repeated dissolving in hot water and salting out. Finally the dyestufi is dried at about 90C.

It yields on wool and silk greenish blue shades of good fastness to light. The. dyeing on silk can be discharged to a pure white. The dyestufi corresponds in the carbinol form in the free state to the following formula; v

SOaH I p v Example 3 a 10 parts of the dyestufi of the following formula:

| \0/ I HOaS I SOIH OH Q2115 are heated rdr 24 hours to about 95 0. with 4.7

parts of para-aminodiethanolaniline-ortho-sulfonic acid of the constitution:

s 7 am N(CH|.CHI.OH)5

. bH in 50 ccs. of pyridine'and 5 ccs. of water. After the pyridine has been distilled in vacuo, the residue is dissolved in 500 ccs. of water and the dyestuff salted out with sodium chloride and filtered:

by suction. By repeated dissolving in hot water and salting out the dyestuff is purified and finallydried at 90 C. The dyestuff yields onwool and silk reddish blue shades; the dyeings on silk are well dischargeable.

The dyestuff corresponds in thecarbinolfornr inthe free state to the following formula sC: j P CaHt 5 11,0 OH I N(CH.CH:.OH):

v I Example 4 7 g parts of the dyestufi of the following en; stitution: v

H 1 i /H v nolsmomo- N-ontontsotn V g l I I are heated for 24 hours to 95 C. with ,6;4 parts or. 4-amino-diphenylamine of the constitution:

in 40 cos. of pyridine and 40ccs. of water. Then the mixture is diluted with 750ccsiofv water; the dyestufi is salted out by adding sodium chloride 2,200,938 and filtered off. By repeated dissolving in hot water and salting out the dyestuif is purified and then dried at C. The dyestufi yields on wool and silk reddish blue shades; the dyeings 0n silk are well dischargeabl'e.

The dyestuff corresponds in the carbinol form in the free state to the following formula:

Example 5 15 parts of the dyestufl' of the following constitution:

01 are heated for 12 hours to about C. with 11 parts of 4-methoxy-4-aminodiphenylamine sulv fonic acid of the constitution mo om BOIH We claim: The dyestuif corresponding in the oarbinol form in the free state to the following formula:

dyeing wool and silk clear blue shades, the dyeings on silk being dischargeable to a pure white.

ERNST TEUPEL. OTIMAR WAHL. 

